Mother-of-two's static caravan is smashed by shard of frozen human waste dropped by passenger jet.
Caroline Guy heard an 'explosion' fearing that her home was being burgled.
Discovered an 18-inch hole in the vehicle's roof and floor with ice scattered.
Civil Aviation Authority said ice was probably the result of a 'leak'.
Miss Guy demanded that somebody takes liability as she 'could have died'.
Five cases of people being hit by waste from plane toilets in last 40 years.